AH31
High Dynamic Range IF Amplifier
Product Information
Application Circuit: 65 – 85 MHz (AH31-PCB75)
VS = +5 V
ID = 150 mA
C5
Typical Performance
.018 mF
0603
Frequency
75 MHz
19 dB
S21 - Gain
S11
L2
330 nH
0805
C1
.018 mF
0603
-25 dB
-25 dB
L1
220 nH
0603
S22
RF IN
RF OUT
Output P1dB
Output IP3
Noise Figure
Bias
+22 dBm
AH31
R2
0 W
0603
+42 dBm
C4
.018 mF
0603
R1
1.0 W
0603
2.4 dB
C3
12 pF
0603
+5 V @ 150 mA
Notes:
1. The amplifier should be connected directly to a +5 V regulator; no dropping resistor is required.
2. If no DC signal is present at the input (pin 1), C1 can be removed. The gate is internally grounded in the amplifier.
3. R2 is used as a placeholder for a different application circuit. It can be removed from the circuit.
4. C2 (from the silkscreen) is not utilized in this application circuit.
Gain vs Frequency
S11, S22 vs Frequency
Wideband S-Parameter Performance
25 C
°
25 C
°
25 C
°
20
18
16
14
12
10
0
-5
20
10
0
S21
S11
-10
-15
-20
-25
-30
S11
-10
-20
-30
S22
S22
55
65
75
85
95
55
65
75
85
95
50 100 150 200 250 300 350 400
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
OIP3 vs Frequency
Noise Figure vs Frequency
P1dB vs Frequency
25 C
°
25 C
°
25 C
°
46
44
42
40
38
36
5
4
3
2
1
0
24
22
20
18
16
14
55
65
75
85
95
55
65
75
85
95
55
65
75
85
95
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
Specifications and information are subject to change without notice
· Web site: www.wj.com February 2004
WJ Communications, Inc · Phone 1-800-WJ1-4401 · FAX: 408-577-6621 · e-mail: sales@wj.com
WJCI [ WJ COMMUNICATION. INC. ]
